NOI Calculator
Calculate Net Operating Income (NOI) from gross rental income and operating expenses. Evaluate real estate investment performance and cap rates.
Formula
NOI = Effective Gross Income - Total Operating Expenses
Net Operating Income equals Effective Gross Income (gross rental income plus other income minus vacancy loss) minus Total Operating Expenses (property tax, insurance, maintenance, management, utilities, and other recurring costs). NOI excludes mortgage payments, depreciation, and capital expenditures.
Worked Examples
Example 1: Small Apartment Building
Problem: A 10-unit apartment building generates $120,000 annual rent plus $5,000 other income. Vacancy is 5%. Expenses: taxes $8,000, insurance $3,000, maintenance $6,000, management $9,600, utilities $4,800, other $2,000. Property value: $1,000,000.
Solution: Gross Potential Income = $120,000 + $5,000 = $125,000\nVacancy Loss = $120,000 x 5% = $6,000\nEffective Gross Income = $125,000 - $6,000 = $119,000\nTotal Operating Expenses = $8,000 + $3,000 + $6,000 + $9,600 + $4,800 + $2,000 = $33,400\nNOI = $119,000 - $33,400 = $85,600
Result: NOI: $85,600/year ($7,133/month) | Cap Rate: 8.56% | Expense Ratio: 28.1%
Example 2: Commercial Office Space
Problem: An office building has gross rental income of $300,000 and $10,000 other income. Vacancy rate 8%. Operating expenses total $95,000. Property valued at $2,500,000 with annual debt service of $120,000.
Solution: Gross Potential Income = $300,000 + $10,000 = $310,000\nVacancy Loss = $300,000 x 8% = $24,000\nEffective Gross Income = $310,000 - $24,000 = $286,000\nNOI = $286,000 - $95,000 = $191,000\nCap Rate = $191,000 / $2,500,000 = 7.64%\nDSCR = $191,000 / $120,000 = 1.59
Result: NOI: $191,000/year | Cap Rate: 7.64% | DSCR: 1.59 | Cash Flow: $71,000
Frequently Asked Questions
What is Net Operating Income (NOI) in real estate?
Net Operating Income (NOI) is the most fundamental metric in commercial real estate valuation and investment analysis. It represents the total income generated by a property after deducting all reasonable and necessary operating expenses, but before deducting mortgage payments, income taxes, depreciation, and capital expenditures. The formula is NOI = Effective Gross Income minus Total Operating Expenses. NOI is critical because it measures the property's ability to generate income from operations independent of how it is financed. This makes it ideal for comparing different properties on an equal basis. Lenders use NOI to determine loan amounts through the Debt Service Coverage Ratio, appraisers use it to determine property value through the capitalization rate, and investors use it to evaluate potential returns before financing.
What expenses are included and excluded from NOI calculation?
Operating expenses included in the NOI calculation are recurring costs necessary to operate and maintain the property. These include property taxes, property insurance, maintenance and repairs, property management fees typically ranging from 8 to 12 percent of gross income, utilities paid by the landlord, landscaping, pest control, janitorial services, and advertising costs for vacant units. Expenses explicitly excluded from NOI are mortgage or debt service payments since NOI must be financing-neutral, income taxes because they vary by owner, depreciation which is a non-cash accounting entry, capital expenditures such as roof replacements or major renovations, tenant improvement allowances, and leasing commissions. The distinction matters because NOI reflects the property performance independent of ownership structure and financing decisions.
What is a good cap rate and how is it calculated from NOI?
The capitalization rate or cap rate is calculated by dividing the NOI by the property value or purchase price, expressed as a percentage. For example, a property generating $80,000 NOI valued at $1,000,000 has an 8 percent cap rate. What constitutes a good cap rate depends heavily on the market, property type, and risk profile. Class A properties in prime urban locations typically trade at 4 to 6 percent cap rates reflecting lower risk and stable income. Class B suburban properties might command 6 to 8 percent. Class C value-add opportunities may offer 8 to 12 percent or higher to compensate for greater risk. Generally, lower cap rates indicate lower risk and higher property values, while higher cap rates suggest higher risk but potentially better cash flow returns. Investors should compare cap rates within the same property type and market for meaningful analysis.
How can I increase the NOI of my rental property?
Increasing NOI requires either growing income or reducing expenses, and the most effective strategies combine both approaches. On the income side, you can raise rents to market rates through gradual annual increases, reduce vacancy by improving tenant retention with responsive management and property improvements, add ancillary income streams such as laundry facilities, parking fees, storage rentals, or pet fees, and implement ratio utility billing to pass certain costs to tenants. On the expense side, you can negotiate better vendor contracts for maintenance and landscaping, implement energy efficiency upgrades including LED lighting and smart thermostats for owner-paid utilities, contest property tax assessments if overvalued, shop insurance annually for competitive rates, and consider self-management if the portfolio size justifies it. Even small improvements compound significantly because each additional dollar of NOI increases property value by the inverse of the cap rate.
What is net operating income (NOI)?
NOI is gross rental income minus all operating expenses, excluding mortgage payments and depreciation. It measures a property's ability to generate income and is used to calculate cap rate and property valuation.
Is NOI Calculator free to use?
Yes, completely free with no sign-up required. All calculators on NovaCalculator are free to use without registration, subscription, or payment.